Home / 20,617.39-30,879.36-13,120.93

Finding the Fourth Proportional to 20,617.39, 30,879.36 and 13,120.93

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Solution

The fourth proportional to 20,617.39, 30,879.36 and 13,120.93 is: 19,651.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,617.39 : 30,879.36 = 13,120.93 : x
  2. Step 2: Convert to fraction form
    20,617.39/30,879.36 = 13,120.93/x
  3. Step 3: Cross multiply
    20,617.39x = 30,879.36 × 13,120.93
  4. Step 4: Simplify right side
    20,617.39x = 405,165,921.00
  5. Step 5: Solve for x
    x = 405,165,921.00/20,617.39
  6. Step 6: Final answer
    x = 19,651.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.